This from the folks at Timpanogos Cave:
Even more incredible than this vast amount of rockfall was the the attitude of our visitors who were stranded in the visitors center with us. Until almost 11 pm a little over 100 people were playing games, watching movies, and making the best of a rough situation. A positive attitude makes such a difference in stressful situations. It was fun hanging out with all of you, we hope it doesn't happen this way again.
And here's the cave trail:
And here's the cave trail: